网壳风振随机响应有限元法分析

针对网壳的空间三维受力特点，考虑多自由度空间相关性，多模态以及模态互在性作用的影响，提出了网壳结构的空间三维风振随机干扰有限元模型，并基于随机理以及振动理论，推导了脉动风作用下网壳结构响应的计算公式，编制了网壳风振计算分析专用程度Ｇｗｉｎｄ，通过大量算例分析表明，计算效率较高，可应用于网壳实际工程风振设计，文中还给出了几种典型工况下单层球面网壳的风振数值分析结果。

Finite Element Analysis of Reticulated Shells for Wind Vibration

Compared with the uni- dimension model of tall building and tower structure,reticulated shells ( RS) poses significant spatial structural performance.In this paper,a random FEM model for wind vibra- tion analysis of RS was employed and numerical statistic formulae of structural response were developed from the random vibration theory.A program Gwind was developed in Matlab integrated development en- vironment.Gwind is proved to be highly efficient and effective for wind vibration analysis of RS from a number of numerical works,and could be used in engineering design.The findings indicate that the influ- ence of wind vibration is generally large,and must be considred carefully in design,especially,when wind is leading load for RS in service.